We report on compensation of diffraction-induced angular dispersion of ultrashort pulses up to a second order. A strategy for chromatic correction profits from high dispersion of kinoform-type zone plates. Ultraflat dispersion curves rely on a saddle point that may be tuned at a prescribed wavelength. Validity of our approach may reach the few-cycles regime.
© 2008 Optical Society of America
Diffraction and Gratings
Original Manuscript: March 5, 2008
Revised Manuscript: June 17, 2008
Manuscript Accepted: June 28, 2008
Published: July 30, 2008
Carlos J. Zapata-Rodríguez, María T. Caballero, and Juan J. Miret, "Angular spectrum of diffracted wave fields with apochromatic correction," Opt. Lett. 33, 1753-1755 (2008)